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<div class="title">nrf51/Board/nrf6310/twi_sw_master_example/main.c</div>  </div>
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<a href="nrf6310_2twi__sw__master__example_2main_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* Copyright (c) 2009 Nordic Semiconductor. All Rights Reserved.</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> * The information contained herein is confidential property of Nordic</span>
<a name="l00004"></a>00004 <span class="comment"> * Semiconductor ASA.Terms and conditions of usage are described in detail</span>
<a name="l00005"></a>00005 <span class="comment"> * in NORDIC SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * Licensees are granted free, non-transferable use of the information. NO</span>
<a name="l00008"></a>00008 <span class="comment"> * WARRANTY of ANY KIND is provided. This heading must NOT be removed from</span>
<a name="l00009"></a>00009 <span class="comment"> * the file.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> */</span>
<a name="l00012"></a>00012 
<a name="l00030"></a>00030 <span class="preprocessor">#include &lt;stdbool.h&gt;</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include &lt;stdint.h&gt;</span>
<a name="l00032"></a>00032 
<a name="l00033"></a>00033 <span class="preprocessor">#include &quot;<a class="code" href="ds1624_8h.html" title="DS1624 digital temperature sensor driver.">ds1624.h</a>&quot;</span>
<a name="l00034"></a>00034 <span class="preprocessor">#include &quot;<a class="code" href="twi__master_8h.html" title="Software controlled TWI Master driver.">twi_master.h</a>&quot;</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include &quot;nrf.h&quot;</span>
<a name="l00036"></a>00036 <span class="preprocessor">#include &quot;nrf_gpio.h&quot;</span>
<a name="l00037"></a>00037 <span class="preprocessor">#include &quot;<a class="code" href="synaptics__touchpad_8h.html" title="Synaptics Touchpad driver.">synaptics_touchpad.h</a>&quot;</span>
<a name="l00038"></a>00038 
<a name="l00039"></a><a class="code" href="group__twi__sw__master__example.html#ga62f51a8e54bb804b83239d837b3b851a">00039</a> <span class="preprocessor">#define DS1624_ADDRESS 0x07 //!&lt; Bits [2:0] describing how pins A2, A1 and A0 are wired</span>
<a name="l00040"></a><a class="code" href="group__twi__sw__master__example.html#ga806752c028108f2fe66e0c276fc93bc0">00040</a> <span class="preprocessor"></span><span class="preprocessor">#define TOUCHPAD_ADDRESS 0x20 //!&lt; Touchpad TWI address in bits [6:0]</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span>
<a name="l00046"></a><a class="code" href="group__twi__sw__master__example.html#ga840291bc02cba5474a4cb46a9b9566fe">00046</a> <span class="keywordtype">int</span> <a class="code" href="group__gpio__example.html#ga840291bc02cba5474a4cb46a9b9566fe">main</a>(<span class="keywordtype">void</span>)
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048   <span class="keywordtype">bool</span> touchpad_init_succeeded;
<a name="l00049"></a>00049   <span class="keywordtype">bool</span> ds1624_init_succeeded;
<a name="l00050"></a>00050   <span class="keywordtype">bool</span> m_conversion_in_progress = <span class="keyword">false</span>;
<a name="l00051"></a>00051 
<a name="l00052"></a>00052   <a class="code" href="group__nrf__gpio.html#gaaa72c88a2a29927a1eeff691d6a21afc" title="Set the direction of a port.">nrf_gpio_port_dir_set</a>(<a class="code" href="group__nrf__gpio.html#ggaa1a5c145e334817f2d960317d64fcb3da9209d7820d65eb58c7804e676581bf40" title="Port 1 (GPIO pin 8-15)">NRF_GPIO_PORT_SELECT_PORT1</a>, <a class="code" href="group__nrf__gpio.html#gga494d7ac30db1cbb6366e0b9ebd5b49b4a90b7ce7a76775cb7534487635755be3f" title="Output.">NRF_GPIO_PORT_DIR_OUTPUT</a>);
<a name="l00053"></a>00053 
<a name="l00054"></a>00054   <span class="keywordflow">if</span> (!<a class="code" href="group__lib__driver__twi__master.html#ga148f1dd10bc0248c6c6c5336ce07a540">twi_master_init</a>())
<a name="l00055"></a>00055   {
<a name="l00056"></a>00056     <a class="code" href="group__nrf__gpio.html#gac1d4940bc5ad4aad4f6363c7021b08ae" title="Write GPIO port.">nrf_gpio_port_write</a>(<a class="code" href="group__nrf__gpio.html#ggaa1a5c145e334817f2d960317d64fcb3da9209d7820d65eb58c7804e676581bf40" title="Port 1 (GPIO pin 8-15)">NRF_GPIO_PORT_SELECT_PORT1</a>, 0x55);
<a name="l00057"></a>00057     <span class="keywordflow">while</span> (1) {}
<a name="l00058"></a>00058   }
<a name="l00059"></a>00059 
<a name="l00060"></a>00060   touchpad_init_succeeded = <a class="code" href="group__nrf__drivers__synaptics__touchpad.html#ga56d2b2da22fd614a12dead51b86f5be8" title="Touchpad initialization.">touchpad_init</a>(<a class="code" href="group__twi__sw__master__example.html#ga806752c028108f2fe66e0c276fc93bc0" title="Touchpad TWI address in bits [6:0].">TOUCHPAD_ADDRESS</a>);
<a name="l00061"></a>00061   ds1624_init_succeeded = <a class="code" href="group__nrf__drivers__ds1624.html#ga0ea8c0c4d140fde9b5b575caed79de6a">ds1624_init</a>(<a class="code" href="group__twi__sw__master__example.html#ga62f51a8e54bb804b83239d837b3b851a" title="Bits [2:0] describing how pins A2, A1 and A0 are wired.">DS1624_ADDRESS</a>);
<a name="l00062"></a>00062 
<a name="l00063"></a>00063   <span class="comment">// If both failed to initialized, halt here</span>
<a name="l00064"></a>00064   <span class="keywordflow">if</span> (!touchpad_init_succeeded &amp;&amp; !ds1624_init_succeeded)
<a name="l00065"></a>00065   {
<a name="l00066"></a>00066     <a class="code" href="group__nrf__gpio.html#gac1d4940bc5ad4aad4f6363c7021b08ae" title="Write GPIO port.">nrf_gpio_port_write</a>(<a class="code" href="group__nrf__gpio.html#ggaa1a5c145e334817f2d960317d64fcb3da9209d7820d65eb58c7804e676581bf40" title="Port 1 (GPIO pin 8-15)">NRF_GPIO_PORT_SELECT_PORT1</a>, 0x5F);
<a name="l00067"></a>00067     <span class="keywordflow">while</span> (1) {}
<a name="l00068"></a>00068   }
<a name="l00069"></a>00069 
<a name="l00070"></a>00070   <span class="keywordflow">while</span>(<span class="keyword">true</span>)
<a name="l00071"></a>00071   {
<a name="l00072"></a>00072     <span class="keywordflow">if</span> (ds1624_init_succeeded)
<a name="l00073"></a>00073     {
<a name="l00074"></a>00074       <span class="keywordflow">if</span> (!m_conversion_in_progress) 
<a name="l00075"></a>00075       {
<a name="l00076"></a>00076         m_conversion_in_progress = <a class="code" href="group__nrf__drivers__ds1624.html#gace297981d492fc044ba97a1954f98c83">ds1624_start_temp_conversion</a>();
<a name="l00077"></a>00077       }
<a name="l00078"></a>00078       <span class="keywordflow">else</span>
<a name="l00079"></a>00079       {
<a name="l00080"></a>00080         <span class="comment">// Succeeded</span>
<a name="l00081"></a>00081         <span class="keywordflow">if</span> (<a class="code" href="group__nrf__drivers__ds1624.html#ga9ac065c4738652386d500c9b35447ada">ds1624_is_temp_conversion_done</a>())
<a name="l00082"></a>00082         {
<a name="l00083"></a>00083           m_conversion_in_progress = <span class="keyword">false</span>;
<a name="l00084"></a>00084 
<a name="l00085"></a>00085           int8_t temperature;
<a name="l00086"></a>00086           int8_t temperature_fraction;
<a name="l00087"></a>00087       
<a name="l00088"></a>00088           <span class="keywordflow">if</span> (<a class="code" href="group__nrf__drivers__ds1624.html#ga554dc82a94c2878635c336b0fb691144">ds1624_temp_read</a>(&amp;temperature, &amp;temperature_fraction))
<a name="l00089"></a>00089           {
<a name="l00090"></a>00090             NRF_GPIO-&gt;OUTCLR = 0x00007F00UL;
<a name="l00091"></a>00091             NRF_GPIO-&gt;OUTSET = ((uint8_t)temperature &lt;&lt; 8);
<a name="l00092"></a>00092           }
<a name="l00093"></a>00093         }
<a name="l00094"></a>00094       }
<a name="l00095"></a>00095     }
<a name="l00096"></a>00096 
<a name="l00097"></a>00097     <span class="keywordflow">if</span> (touchpad_init_succeeded)
<a name="l00098"></a>00098     {
<a name="l00099"></a>00099       <span class="comment">// Read button status</span>
<a name="l00100"></a>00100       uint8_t touchpad_button_status;
<a name="l00101"></a>00101       <span class="keywordflow">if</span> (<a class="code" href="group__nrf__drivers__synaptics__touchpad.html#ga517f43a4e4520713f69f14b38efc927b" title="Function to read a touchpad register contents over TWI.">touchpad_read_register</a>(<a class="code" href="group__nrf__drivers__synaptics__touchpad.html#ga31521894e811710e49d5d9bb9abcecb8" title="Button status register.">TOUCHPAD_BUTTON_STATUS</a>, &amp;touchpad_button_status))
<a name="l00102"></a>00102       {
<a name="l00103"></a>00103         <span class="comment">// There&#39;s a active low button on the side of the touchpad, check the state and light up a LED if it&#39;s pressed</span>
<a name="l00104"></a>00104         NRF_GPIO-&gt;OUTCLR = 0x00008000UL;
<a name="l00105"></a>00105         <span class="keywordflow">if</span> (!(touchpad_button_status &amp; 0x01))
<a name="l00106"></a>00106         {
<a name="l00107"></a>00107           NRF_GPIO-&gt;OUTSET = 0x00008000UL;
<a name="l00108"></a>00108         }
<a name="l00109"></a>00109       }
<a name="l00110"></a>00110     }
<a name="l00111"></a>00111   }
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 
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